Valve



Oct. 3, 1944.

H. A. CARTWRIGHT VALVE Filed July 9, 1942 2 Sheeis-Sheet l ATTORNEYPatented Oct. 3, 1944 UNITED STATES P-TENT OFFICE:

VALVE Horace A. Cartwright, Independence. Kans.

Application'luly 9,-.1942, Serial No. 450,237

8 Claims.

This'` invention relates to. valves;.. and more; particularly to sprayvalves such as are` used on. bars to distribute bituminousVmaterialrusedy in-A road construction and maintenance. Work;.the=..principal. object.` of the invention being to prof-f Vide a spray barvalve capable of e'ectively-r handling heavy viscous materials'.

This application is a continuationzinipartY of', my co-pendingapplication for patent' on Spray' bar for. distributing bituminous andlikeA materials, Serial No. 315,056, filed January 22. 1940.

Other objects ofthe invention are to. provide a circulatingspray barwith.- spray nozzles'. capable of effecting positive. cut-off of" thespray material; to provideL spray nozzles which are self-clearing of'material that becomes 1 set inthe jet'v orifices thereof, therebyavoiding skipping ofi the nozzles; to'provide a common control. for a.vplurality of spray valves :mounted on a sprayv bar; to provide :a spray"valve having ay spray port. wherein the cut-off is immediately`adjacent.

the :outlet port of the spray valve; to providel a rotary type of valvewherein circulation ofk heated material is maintained uptothe pointy ofAcuteoft'; toprovide a valve withrportsof dif-- ferential size .which ymay be selectively used depending upon the character 0f the coatingl material or the amount of' coverage desired; toA provide resilient meansfor maintainingl thevalve in seated condition; to provide aV spray valvebody with a plurality of spray portsffor selective use; to provide anauxiliary-closureior thezspray. ports not in use to prevent accidentalopening of said' ports;

of' travel of the spray'b'ar forl formingV indevide control valveshaving specially shaped passages Whereby-the sprays may have lean orrichcenters; and to provideimproved e1ements-'and=- arrangements thereofin valves of the character and-for the purposes'set forth:

In accomplishingthese and other objects of the invention, as hereinafterdescribed,v I'haveprovided` improved details of structure, thepreferred` formszofwhich are illustrated'in the ac-v comlpanyingdrawings, wherein:

Figzl is a rear elevational Viewvof a-vportion" ofa.distributingimachine equippedfwith a spray-'f bar embodying:A thevfeatures of` the p1-esentiK in vention, one. of: the endzsections of zthe spray "bari tov provide a movableclosureifor the spray ports forregulating they effectivesizeoff the spray ports and for trimming theedge of the spray, particularly at theends ofthe spraybar; to provide aspray valve having elongated spray ports at an angletofthe path 'Y 40"pendentoverlapping, fan-shaped sprays; to prof b'eingshown in travellingposition and the other inrspraying.V or distributing position.

Fi`g;.2:is aplan view ofa portion of theispray bar. andione of thesprayvalves;`

Fig.; 3, is a cross-section through thev valve andgsprayr port'v on theline 3-3, Fig; 4.

Fig. 751s. across-sectionthrough the spray bar' and valve onthe line'l-l, Fig; 6.

Fig. 8.is a .horizontal cross-section through the valve, particularlyillustrating the angular location ofthe spray port;

Fig..9 is adetail perspectiveview of the fparts oioneof the sprayvalves, said parts being shown in;disassembled spaced relation.

Referringmore indetail to the. drawings:

I designates a machine for distributing bituminous material on a roadunder construction or inthe maintenance thereof. The machine includesatankv 2.for. containing material to he` distributed and which iscarriedon the chassis ofiJa motor truckindicated by the Wheels 3. The tankilisprovided with a heater (not. shown) so that the material is. kept inheated condition 1capable of free iiow under pump pressure through apipe B'to a spray lbar 5, circulated throughthe spray bar and returnedto the tank through a piper 4. The pipes: 4 and 6` are provided `withthree-Wayvalves l and 8 respectively having` interconnection through anipple 9 so that,-4 when material is being icirculated fromY the tankllthroughthe bar, the valvesfl and 8v are set to provide iloW through therespective pipes to and from the tank,.andwhen the spraying operation isto berstarted the valves 'l and 8 are'adjustedto providefow to the'spraybar through bothpipes.

The spray bar- 5. is suitably supported trans'- verselyofthe rear of thetruck and includegaVr horizontally arranged central section I0' and endsections Il and l2. The-endvsections arehinged- 1y connected to the`ends of the central sectionby hinge joints I3 and. I4 'toprovide'full-width coverage-of a roadway when the end *sections areextended.v and to provide clearance when the end sections are moved tovertical position as when the truck is travelling along a Khighway toand from the site of operation. Each spray bar section includes an outerpipe I5, Fig. 4, having an axially arranged inner pipe I6 of smallerdiameter than the inner diameter of the outer pipe to provide a flowpassageway I1 therebetween. Formed in the rear side of the outer pipe isa series of threaded openings I8, Fig. 4, which extend through lateralbosses I9. Threaded in the openings I8 are spray valves 20, eachincluding a cylindrical body 2| having external threads 22 to receivethe threads about the opening I8 and provided with axial valve chambers23.

The valve chambers 23 are of cylindrical form at their inlet ends andhave central seats 24 terminating in reduced cylindrical bearingportions 25. Engaging the conical seats are rconically shaped valveheads 26 having stems 21 rotatable in the bearing portions 25. The valvestems extend from the valve bodies and carry actuating levers 28. Theactuating levers 28 are affixed to the stems of the valves by pins 29extending therethrough as shown in Fig. 4. The exteriors of the valvehousings have similarly reduced portionsto form annular seats 30 forsprings 3 I, having their opposite ends bearing against a lever 28 toretain the conical head 26 of the valve in sealing engagement with theconical seat 24 of the valve chambers.

Formed at opposite diametrical sides of the valve bodies are arcuateslots 32 and 33, Fig. 3, having different widths, either one of whichmay be turned downwardly to provide a spray outlet orifice for thecoating material. For example, in

Fig. 4, the narrower slot is shown as being utilized as the effectivespray outlet and the wide slot is closed by the conical head of thevalve. The valve bodies are retained in selected position by lock nuts34 that are threaded thereon and drawn against the faces of the bossesI9 as shown in Fig. 4. Formed in the heads 26 of the valves arepassageways 35 having inlets 36 arranged coaxially of the end faces ofthe valves and having outlets 31 opening radially through the conicalfaces of the heads to connect with the selected spray ports, as shown inFig. 4. The terminal edges 38 and 39 of the respective slots arebevelled outwardly so that any material which may set therein is readilyblown out when the valve iS open. The free ends of the levers 28 areprovided with openings 40 to receive the shank 4I of studs 42 projectingfrom links 43. The links are ipreferably arranged so that they connectthe valves in groups, with the ends of the adjacent links for each groupconnected together through a common mounting on one of the Shanks 4I, asshown in Fig. 1. The links may be reciprocated to effect opening andclosing of the valve by any suitable mechanism, for example, one of thelever` arms may be provided with an extension 44, Fig. 1, to which acontrol cable or rod 45 may be connected.

The operation of a spray bar having valves constructed as described isas follows:

Bituminous material is pumped from the tank under pressure, the valves 1and 8 being adjusted in such a manner that iiow from the pump isdelivered to both inner pipes and the annular passageway I1 of the spraybar section, and then out of the spray valves onto the road. When it isnecessary to maintain circulation of the material through the bar, thevalve 8 is open to discharge the material into the inner pipe I6 and thevalve 1 is set so that the line 4 is open to return the material to thetank, the spray valves .remainingv ample 33.

closed. Since the bituminous material is usually obtained at a centralstation and conveyed to the site of the work, the end sections of thespray bar are moved to travelling position. When heating the material inthe tank and when loading, the valve 8 is adjusted to close flow intothe pipe 6 and the valve 1 is adjusted to connect the pipe 9 with thepipe returning to the tank.

When the scene of intended operations is reached, the valves 1 and 8 arethen set in such a manner that the material is discharged under pumppressure, through both pipes 4 and 6. The valves are openedsimultaneously by locking the lever 28 to bring the outlet ports of thepassageways into registry with the lower slots, for ex- The material isthen discharged through the slots onto the roadway. When the arms areswung in the opposite direction, the ports in the valves are moved outof registry with the slots to cut off the flow. Since the flow is cutoff directly at the inlet of the slots, the only material that canbecome set is that remaining in the slots, but, due to the shape of theslots, this material is readily discharged when the valves are againopened. If it is desired to increase the amount of material to beapplied to the road, the jam-nuts 34 may be loosened and the entirevalve body rotated so that the largest slots 3,2 are facing downwardly,after which the jam-nuts 34 are tightened to retain the valve bodies inthe selected position.

In some work it may be desirable to have more material discharged at thecenter of the sprays.V

This is effected, as shown in Fig. 5, by shaping the passageways 35 insuch a manner that the central portion 46 thereof is eiective to openthe slots, While the ends of the slots are covered or partially covered,as shown at 41 in Flg.5.

In the modified forn of vawe shown in Figs. y6l to 9 inclusive, theslots '48 and 49 in the cylin-v drical valve body 50 are cut at an angleto the longitudinal axis of the valve whereby the spray delivered by thevalve is fan-shaped and at an' angle to the line of travel of the truckso that the sprays are independent but overlapping. Cooperating -withthe angular arrangement of ,the slots 48 and 49 are passageways 5I inthe conically shaped valve head 52, the passageways being arrangedsubstantially perpendicularly to thev end engaging the valve bodiesV andthe other bear- Y ing against a lever 59 keyed to thevstem 60 by a pin6I. The valve is opened and closed by rotation of the valve member bythe lever 59 which is operated through linkage 62.

In order to avoid the possibility of the acci-l dental movement of thelever 59 to the extent that the slot l48 might be opened and bituminous.material sprayed upwardly over` the mechanism,-

a clip 63 is preferably sleeved overthe cylindrical portions of thevalve body to1close the slots not directed toward the roadway;` The clip63 extends substantially more than half-way around theperiphery of thevalve body so: that pressure exerted on said clip through the'slots 48is off-- The valve bodies are locked.

setby the gripping-action of the ends 64 of the clip. The clip issubstantially wider than the greatest width of the slots to provide'sufficient bearing area on thevalve body to effectively close theslotstherein.

Much difficulty has been experienced in the trimming of the spraysadjacent the side ofy the road to'make a deiinite line of coverage andmaintain an even distribution of bituminousmaterial completely acrossthe road to the edges thereof.

In the present valve structure the sprays may be trimmed as desired byrotating the clip 63 on the valve body to move one of the ends 64 of theclip over a portion oi the slots discharging on the road to effectivelyreduce the area thereof as shown at 65. In this manner the fan shapedspray may .be cut on one side to produce a'denite line of coveragewithout interfering with the normal distribution of the material on theroad by the overlapping sprays.

The operation of a spray bar having valves of the character shown inFigs. 6 to 9 inclusive, is substantially the same as that described inreference to the valves shown in Figs. 2, 3 and 4, in regard to thedelivery and circulation of material through said spray -bar and valve.The clips 63 are normally placed on the upper portion of the valve bodyto eiect closing of the slots directed upwardly away from the road. Theclip on the valves adjacent the end of the spray bar is rotated on thevalve body until one end 64 of said clip reduces the eiective area ofthe slots to trim the outer edge of the fan shaped spray to eiect adefinite line of coverage of the road.

From the foregoing it is apparent that I have provided a spray bar valveof simple form, which is easily cleaned and is easily controlled by aminimum amount of linkage; that the valve parts are readily movable withlittle danger of sticking; and that the sprays may be instantly placedin operation without heating or other preliminary treatment. It is alsobelieved apparent that damaged or worn valves may be exchanged with aminimum amount of Work and may be adjusted to accurately control theline of coverage for maintaining the coverage constant completely acrossthe roadway.

What I claim and desire to secure by Letters Patent is:

l. A spray valve including a housing having a bore provided withelongated ports of dierential capacity communicating the bore with thehousing exterior, said ports being elongated substantiallycircumferentially of said housing bore, a valve member having a headrotatable in the housing bore, one end of said head being adjacent a uidsupply and having a slot originating in said end of the head andarranged in angular relation to the elongated ports in the valve housingto register with one of said ports at one position of the valve member,and means for changing the effective position of the respective ports ofsaid valve housing.

2. A spray valve including a valve housing provided with a bore having aconical seat and an arcuate slot intersecting said seat to provide aspray opening communicating with the bore from the housing exterior, avalve having a conical head rotatably mounted on said seat, one end ofsaid conical head being adjacent a fluid supply and having a slotoriginating in said end of the head arranged in angular relation to theslot in the valve housing for forming a flow passage, said valve beingprovided with a stem projecting from said housing, an operating lever onthe stem, and a spring engaged between a valve housing and the operatinglever to retain the head of said valve in'sealing contact with saidseat.

3. A spray v-alve including a valve housing providing-with a conicalseat and an arcuate slot intersecting said seat to provide a sprayopening, a valve having a conical head rotatably mounted on said seat,one end of said conical head being adjacent a fluid supply and having aslotl originating in s-aid end in the head arranged in angular relationto the arcuate slot and shaped to control flow through said slot forforming a flow passage, said valve being provided with a stem projectingfrom said housing, and an operating lever on the stem.

4. A spray valve including a housing having spaced elongated spacedports of differential capacity arranged in angular relation to the axisof said valve housing, said ports being elongated substantiallycircumferentially of said housing, a valve member closing said portshaving an end arranged adjacent a fluid supply, said valve member havinga slot originating in said end of the valve member forming a flowpassage arranged to register with one of said ports at one position ofthe valve member, and an auxiliary member rotatably mounted on the valveto selectively adjust the opening of certain of the spaced diierentialports.

5. A spray valve including a housing having a bore provided withelongated ports of differential capacity communicating the bore with thehousing exterior, said ports being elongated substantiallycircumferentially of said housing bore, the valve member having a headrotatable in the housing bore, one end of said head being adjacent afluid supply and having a slot originating in said end of the head andarranged in angular relation to the elongated ports in the valve housingto register with one of said ports at one position of'the valve member,means for changing the eiective position of the respective ports of saidvalve housing, and means rotatable on the housing for selectivelycovering a portion of the selected ports to trim the spray of materialissuing therefrom.

6. A spray valve including a valve housing provided with a bore having aconical seat and an arcuate slot intersecting said seat to provide aspray opening communicating with a bore from the housing exterior, avalve having a conical head rotatably mounted on said seat, one end ofsaid conical head being adjacent a fluid supply and having a slotoriginating in said end-of the head arranged in angular relation to theslot in the valve housing for forming a flow passage, said valve beingprovided with a stem projecting from said housing, an operating lever onthe stem, a spring engaged between the valve housing and the operating.lever to retain the head of said valve in sealing contact with saidseat, and means rotatably mounted on the housing for selectivelycovering a portion of the arcuate slot to trim the spray of materialissuing therefrom.

7. A spray valve including a valve housing having a conical seat and anarcuate slot intersecting said seat to form a spray opening, a valvehaving a conical head rotatably mounted on said seat, one end of saidconical head being adjacent a uid supply and having a slot originatingin said end of the head and arranged in angular relation to the slot inthe valve housing for forming a passage shaped to restrict the flowadjacent the edges of the arcuate slot in the valve'housing to form aspray of material having a greater discharge at the center of said spraythan at the edges, said valve being provided with a stem projecting fromsaid housing, and an operating lever on the stem.

8. A spray bar for asphalt and the like having a series of laterallyarranged spray valves, each having a bore provided with an arcuate slotto 10 form a spray opening communicating the bore with the valveexterior, valve members rotatable in the bores having ends adjacent auid supply and each having a slot originating in said ends of the valvemembers arranged in angular relation to the slot in each valve housingfor forming flow passages whereby fan-shaped overlapped sprays aredelivered by the spray valves of the spray bars, and means rotatable onselected spray valves adjacent the end of the spray bar for selectivelycovering a portion of the arcuate slots of said valves to trim the sprayof materials issuing therefrom.

HORACE A. CARTWRIGHT.

